Corrugation in hopper doors for railway cars



Aug. 9

v. E. SISSQN CORRUGATION IN HOPPER DOORS FOR RAIL WAY CARS Filed Aug. 13, 1925 A thereof be as light as possible.

Patented Aug. 9, 1927.

.. UNITED STATES 1 PATENT" OFFICE.

VIN'ION E. SISSON,.OF CHICAGO, ILLINOIS, ASSIGNOR TO UNION METAL PRODUCTS COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF DELAWARE.

CORRUGATION IN HOPPER DOORS FOR RAILWAY CARS. I

Application filed August 13, 1925. Serial No. 50,044.

The invention relates to a railway dump car having a door forming apart of the car for retaining the load therein, which door is provided with hinges adjacent one of its sides and is capable of being dropped. or swung open so that the load in discharging slides or passes over the upper surface of the door. Any means of raising the door to the closed position and any means for locking and releasing thedoor' may be employed with-my device. A door for this purpose must be very strong and durable because:

First: It is part of the floor of the car and as such must sustain the load. as well. as

the impact blow when the car is in motion.-

Second: The car is frequently loaded from chutes or tipples from a height of ten feet or more, causing theload to be dropped directly upon the doors.

Third: Clam shellbuckets are frequently used to unload such cars and it is not uncommon for these buckets to rest'upon and drag over the doors.

Fourth When the door suddenly comes to rest after being dropped, it is not only subjected'to a severe shock. but it must sustain the severe impact thrust of the load which, of course, follows the door. v

Fifth As the load is theoretically equally distributed, the door must be strong over its entire area and must be capable of transmitting the resulting strains to the car body asit does to haul a ton of paying freight, it is imperative that the car andfany part Furthermore, the total weight of car and freight is determined by the strength of certain stand ard axles, so that the lighter the car the greater amount of freight a given car will be allowed to carry. y

The advantages of my door are applicable to any door of a freightcar over which the lading moves when being discharged from the car, such as drop bottom general service cars (used in the drawings) hopper cars,

As it costs as much to haul a ton of car a swinging side doors or hopper bottom co'al cars, etc.

An object of this invention is to provide a plate metal door with corrugations of particular contour that from their form are peculiarly adapted to meet the stresses and strains alreadydescribed, and at'the same time, to provide a Very light and inexpensive door.

of the hinges. In the drawings:

Fig. 1 shows a portion of a railway car withmy device applied thereto.

Fig. 2 is a section on line 22 of Fig. 1. Fig. 3 is a section on line 3--3 of Fig. 1.

Fig 4 is an enlarged section through a 4 substantially perpendicular to the plane of the plate which are connected by curved portions 5. Each corrugation is wider than the distance 30between parallel planes 31 The number of the: corrugations 'Wlll depend upon the number and location and 32 drawn through the outermost parts of the corrugated plate. The greater the distance between the main walls. 4, the greater the width of the connecting portions 5. and consequently, more metal .is positioned away from the neutral axis 10 10 of the section, resulting in a higher section modulus, meaning, of course, astronger corrugation, theoretically.

The connecting portion (5) is a (secondary) beam and must transmit the load imposed upon it to the main walls 44. In actual practice. a flat connecting portion will deflect and not perform its functionif the main walls are spaced very. far apart. My construction increases the capacity of the connecting member to transmit thrusts to the adjacent main wall's and thereby permits the main walls to be spaced further apart, thus obtaining a higher section modulus. as statedabove. The width of each corrugation is preferably constantthroughout the major portion of its length.

The outwardly projecting portions 5-5 between the walls 4: act in the manner of an arch or bridge whereby the stresses are distributedthroughout the outwardly projecting portions to the main walls.

The parts of the door 6. remaining (positioned) between the adjacent corrugations are preferably formed similar to the out wardly projecting portions 5 5 of the corrugation but project oppositely thereto, thus placing the neutral axis l0s-l0 of the corrugated plate midway between parallel planes drawn through the outermost parts of the corrugated plate.

It preferable to position the corrugations parallel with the direction of the discharging cargo so that they will not interfere with its free movement. However, the corrugations may be positioned normal or at right angles to the direction of the mov ing cargo (or in fact, obliquely thereto), or the corri'igations may be pressed entirely from either side of the plate (ie, project ing upwardly or downwardly) or may be pressed partially from one side and partially from the other side of the plate, i'l' desired. Any of such arrangements would come within the scope of this invention.

In my co-pending application Serial No. 50,043, filedAugust 13, 1925, I have disclosed and claimed adoorhaving a plurality of parallel downwardlyprojecting embossments therein with flat places between some of the embossments and hinges parallel to the embossments and secured to the flat places, which structure is disclosed but not claimed in this application.

\Vhat I claim is:

1. In combination with the other elements of a railway dump car, a door supported by hinges adjacent one side made of a metallic plate formed with integral corrugations, main walls and curved arched portions connecting said main walls, the width of each corrugation being greater than the distance between parallel planes drawnthrough the outermost parts of the corrugated plate.

In combination with the other elements of a railway dump car, a door supported by hinges adjacent one side made of a metallic plate formed with integral corrugations of constant width throughout the major portion of their length, having main walls and curved arched portions connecting; said main walls, the width of each corrugation being greater than the distance between parallel planes drawn through the outermost parts of the corrugated plate.

3. In combination with the other elements of a railway dump car, a door supported by hinges adjacent one side made of a metallic plate formed with integral corrugations merged into the plate at their ends, main walls and curved arched portions connecting said main walls, the width of each corrugahinges adjacent one side made of a metallic plate, formedv with integral corrugations spaced apart distances equal to their width,

main walls and curved arched portions connecting said main-walls, the width of each corrugation beingrgreater "than the distance between parallel planes drawn through the outermost parts oi the corrugated plate.

In: conal'iination withthe other elements or a railway dump car, a door supported by l'iin'ges adjacent one sidemade of a metallic plate formed with integral corrugationslof constant width throughout the major portion of their length and spaced apart distances equalto their-"width and merged into the plate at their ends. said corrugations-having n'iain walls and curved arched portions. @011- necting said main walls, the width of each corrugation being greater than the distance between parallel planes drawn, through the outermost parts of the corrugated plate.

6. In combination with the other elemelilts of a rail: way dump car, a door supported by hinges adjacent one side made of. ametallic plate formed nth integral; corrugations,

said main walls, the width of each corrugation being greater than the distance-between parallel planesdrawn through the. outermost parts of the-corrugated plate and the constant width throliighout the major portion of their length having main wallsand curved arched portions connecting said main walfs, the width of each corrugation being greater than the distance between parallel planes drawn through the outermost parts main walls and curved portions connecting of the corrugated plate and the spaces between said corrugations arched. in the opposite direction to saidarched portions 8. In combination with the other elements of a railway dump car, a doorsupported by hinges adjacent one side made ofa metallic plate formed with integral corrugations merged into the plate at their ends, main walls and curved arched portions connectingsaid main-walls, the width of each corrunation being greater than the distance between parallel planes drawn through the outermost parts of the corrugated plate and the spaces between said corrugations arched in the opposite direction to said arched p0r-.

tions. 7 I

9. In combination with the other elements of a railway dump car, a door supported by hinges adjacent one side made of a metallic plate formed with integral corrugations spaced apart distances equal to their Width, main walls and curved arched portions connecting said main walls, the width of each corrugation being greater than the distance between parallel planes drawn through the outermost parts of the corrugated plate and the spaces between said corrugations arched in the opposite direction to said arched portions.

10. In combination with the other elements of a railway dump car, a door supported by hinges adjacent one side made of a metallic plate formed with integral corrugations of constant width throughout the major por tion of their length and spaced apart distances equal to their Width and merged into the plate at their ends said corrugations having main walls and curved arched portions connecting said main walls, the Width of each corrugation being greater than the distance between parallel planes drawn through the outermost parts of the corrugated plates and the spaces between said corrugations arched in the opposite direction to said arched portions.

VINTON E. SISSON. 

